docs: def get_bucket_type_props(self, bucket_type):
          """
          Fetch bucket-type properties
          """
          self._check_bucket_types(bucket_type)
          msg_code = riak.pb.messages.MSG_CODE_GET_BUCKET_TYPE_REQ
          codec = self._get_codec(msg_code)
          msg = codec.encode_get_bucket_type_props(bucket_type)
          resp_code, resp = self._request(msg, codec)
          return codec.decode_bucket_props(resp.props)